Under what conditions must a motor vehicle have its daytime running lights turned on during daylight hours, and in the absence of these in the vehicle's design – its low-beam headlights?

• 1While travelling on freeways.
• 2While travelling on roads outside built-up areas from October 1 to May 1.
• 3While travelling on roads outside built-up areas.
• 4Always while the vehicle is travelling.